/******************************************************************
 *
 *	CyberHTTP for Java
 *
 *	Copyright (C) Satoshi Konno 2002-2004
 *
 *	File: HTTPSocket.java
 *
 *	Revision;
 *
 *	12/12/02
 *		- first revision.
 *	03/11/04
 *		- Added the following methods about chunk size.
 *		  setChunkSize(), getChunkSize().
 *	08/26/04
 *		- Added a isOnlyHeader to post().
 *	03/02/05
 *		- Changed post() to suppot chunked stream.
 *	
 ******************************************************************/

package org.cybergarage.http;

import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.Calendar;

public class HTTPSocket
{
    // //////////////////////////////////////////////
    // Constructor
    // //////////////////////////////////////////////

    public HTTPSocket(Socket socket)
    {
        setSocket(socket);
        open();
    }

    public HTTPSocket(HTTPSocket socket)
    {
        setSocket(socket.getSocket());
        setInputStream(socket.getInputStream());
        setOutputStream(socket.getOutputStream());
    }

    public void finalize()
    {
        close();
    }

    // //////////////////////////////////////////////
    // Socket
    // //////////////////////////////////////////////

    private Socket socket = null;

    private void setSocket(Socket socket)
    {
        this.socket = socket;
    }

    public Socket getSocket()
    {
        return socket;
    }

    // //////////////////////////////////////////////
    // local address/port
    // //////////////////////////////////////////////

    public String getLocalAddress()
    {
        return getSocket().getLocalAddress().getHostAddress();
    }

    public int getLocalPort()
    {
        return getSocket().getLocalPort();
    }

    // //////////////////////////////////////////////
    // in/out
    // //////////////////////////////////////////////

    private InputStream  sockIn  = null;
    private OutputStream sockOut = null;

    private void setInputStream(InputStream in)
    {
        sockIn = in;
    }

    public InputStream getInputStream()
    {
        return sockIn;
    }

    private void setOutputStream(OutputStream out)
    {
        sockOut = out;
    }

    private OutputStream getOutputStream()
    {
        return sockOut;
    }

    // //////////////////////////////////////////////
    // open/close
    // //////////////////////////////////////////////

    public boolean open()
    {
        Socket sock = getSocket();
        try
        {
            sockIn = sock.getInputStream();
            sockOut = sock.getOutputStream();
        }
        catch (Exception e)
        {
            return false;
        }
        return true;
    }

    public boolean close()
    {
        try
        {
            if (sockIn != null)
                sockIn.close();
            if (sockOut != null)
                sockOut.close();
            getSocket().close();
        }
        catch (Exception e)
        {
            // Debug.warning(e);
            return false;
        }
        return true;
    }

    // //////////////////////////////////////////////
    // post
    // //////////////////////////////////////////////

    private boolean post(HTTPResponse httpRes, byte content[], long contentOffset,
                         long contentLength, boolean isOnlyHeader)
    {
        httpRes.setDate(Calendar.getInstance());
        OutputStream out = getOutputStream();

        try
        {
            httpRes.setContentLength(contentLength);

            out.write(httpRes.getHeader().getBytes());
            out.write(HTTP.CRLF.getBytes());
            if (isOnlyHeader == true)
            {
                out.flush();
                return true;
            }

            boolean isChunkedResponse = httpRes.isChunked();

            if (isChunkedResponse == true)
            {
                String chunSizeBuf = Long.toString(contentLength);
                out.write(chunSizeBuf.getBytes());
                out.write(HTTP.CRLF.getBytes());
            }

            out.write(content, (int) contentOffset, (int) contentLength);

            if (isChunkedResponse == true)
            {
                out.write(HTTP.CRLF.getBytes());
                out.write("0".getBytes());
                out.write(HTTP.CRLF.getBytes());
            }

            out.flush();
        }
        catch (Exception e)
        {
            // Debug.warning(e);
            return false;
        }

        return true;
    }

    private boolean post(HTTPResponse httpRes, InputStream in, long contentOffset,
                         long contentLength, boolean isOnlyHeader)
    {
        httpRes.setDate(Calendar.getInstance());
        OutputStream out = getOutputStream();

        try
        {
            httpRes.setContentLength(contentLength);

            out.write(httpRes.getHeader().getBytes());
            out.write(HTTP.CRLF.getBytes());

            if (isOnlyHeader == true)
            {
                out.flush();
                return true;
            }

            boolean isChunkedResponse = httpRes.isChunked();

            if (0 < contentOffset)
                in.skip(contentOffset);

            int chunkSize = HTTP.getChunkSize();
            byte readBuf[] = new byte[chunkSize];
            long readCnt = 0;
            long readSize = (chunkSize < contentLength) ? chunkSize : contentLength;
            int readLen = in.read(readBuf, 0, (int) readSize);
            while (0 < readLen && readCnt < contentLength)
            {
                if (isChunkedResponse == true)
                {
                    String chunSizeBuf = Long.toString(readLen);
                    out.write(chunSizeBuf.getBytes());
                    out.write(HTTP.CRLF.getBytes());
                }
                out.write(readBuf, 0, readLen);
                if (isChunkedResponse == true)
                    out.write(HTTP.CRLF.getBytes());
                readCnt += readLen;
                readSize = (chunkSize < (contentLength - readCnt)) ? chunkSize
                                                                  : (contentLength - readCnt);
                readLen = in.read(readBuf, 0, (int) readSize);
            }

            if (isChunkedResponse == true)
            {
                out.write("0".getBytes());
                out.write(HTTP.CRLF.getBytes());
            }

            out.flush();
        }
        catch (Exception e)
        {
            // Debug.warning(e);
            return false;
        }
        return true;
    }

    public boolean post(HTTPResponse httpRes, long contentOffset, long contentLength,
                        boolean isOnlyHeader)
    {
        // TODO Close if Connection != keep-alive
        if (httpRes.hasContentInputStream() == true)
            return post(httpRes, httpRes.getContentInputStream(), contentOffset, contentLength,
                        isOnlyHeader);
        return post(httpRes, httpRes.getContent(), contentOffset, contentLength, isOnlyHeader);
    }
}
